Preparation And Characterization Of Pomegranate Scintillation Ceramic Powder Materials

Under the high-energy radiation produces visible light the categories of material called twinkle,currently in medical treatment,exploration and scientific research is more and more attention,also in constant increase and expand its purposes.Garnet system of scintillation ceramic with excellent performance,predecessors to the system of powder preparation and ceramic sintering has a lot of research,the development of this subject is based on the previous work on the basis of a lot of research,through to the elements of replacement,to implement the flashing on the premise of cost reduction performance,and realize the drive control preparation.Aluminum gadolinium gallium garnet(Gd₃?Ga,Al?₅O₁₂:Ce,GAGG for short)is a kind of excellent performance of scintillation ceramic,Because of its cubic structure,and on the light yield,decay velocity,density has the absolute advantage,make it has a great prospect in application,also is a major concern.Our laboratory on a large study of garnet structure,especially in the garnet polycrystalline material powders on the preparation of by means of coprecipitation preparation methods of different system of garnet powder is prepared.Through the research of this topic is committed to element substitution,by seeking appropriate elements to obtain properties superior to save costs at the same time scintillation ceramic powders.Experimental main contents: the Gd₂O₃,In₂O₃,NH4Al?SO4?2?12H2O and Ce2?CO₃?3 reagent dissolve in dilute nitric acid producing soluble salt mixture,using NH₃·H2O and NH4HCO₃ solution precipitator,through coprecipitation alkali sulphate carbonate precursor compound salt hydrates,through the temperature above 950 ? sintering processing preparation of the cubic crystal system GIAG: Ce garnet powder.Then the precursor and sintered powder were characterized.By precipitation reaction slowly to get the corresponding containing alkali sulphate carbonate compound salt hydrates,again to the precursor compound salt calcined under high temperature treatment,can get contains Ce³⁺ active ion GIAG:Ce garnet structure of polycrystalline powder.By means of X-ray powder diffraction analysis and differential thermal analysis research,the precursor in the sintering process has been turned into GIAG: Ce garnet polycrystalline phase structure,began to appear when the temperature is above700 ? crystallization GIAG: Ce phase,with the rising of the temperature,when the precursor after 950 ? sintering into a cubic crystal system already basically GIAG: Ce garnet powder,grain size analysis of the obtained powder on the particle size distribution and dispersion withgood performance.In recent years,with the in-depth research of rare earth elements found rich rare earth oxide solid solution performance,study the characteristics and application of solid solution is of great significance to the development of rare earth elements.Lutetium oxide?Lu₂O₃?materials have high density of about 9.42 g/cm3,for some high-energy rays it hinder the ability is quite strong,look from the internal structure,Lu₂O₃ is cubic crystal system with optical isotropic,greatly facilitate the preparation of transparent polycrystalline materials.In₂O₃ is a kind of n-type semiconductor functional materials with wide band gap width,the smaller resistivity etc.This topic is on the basis of predecessors' research for elements instead of innovation to achieve higher performance of new materials,at the same time,focus on the better performance of In₂O₃ and Lu₂O₃?0.080 nm?and satisfy the Lu³⁺ion radius and In³⁺ion radius?0.0861 nm?were similar to very good solution,experiment with rare earth oxides with oxide In₂O₃ Lu₂O₃ synthesized from a pure?Lu1-x Inx?₂O₃?x = 0,0.25,0.5,0.75,1.0?system of solid powder.And then to characterization.In³⁺ ion doping is studied through characterization?Lu1-x Inx?₂O₃obtained solid solution in the crystallographic parameters and particle size distribution,microstructure morphology and properties,such as uv-visible absorption spectrum.